199
159
return buffer_capacity;
202
/* Add server to set of servers to retry periodically */
203
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
server *new_server = malloc(sizeof(server));
207
if(new_server == NULL){
208
perror_plus("malloc");
211
*new_server = (server){ .ip = strdup(ip),
213
.if_index = if_index,
215
if(new_server->ip == NULL){
216
perror_plus("strdup");
219
/* Special case of first server */
220
if (mc.current_server == NULL){
221
new_server->next = new_server;
222
new_server->prev = new_server;
223
mc.current_server = new_server;
224
/* Place the new server last in the list */
226
new_server->next = mc.current_server;
227
new_server->prev = mc.current_server->prev;
228
new_server->prev->next = new_server;
229
mc.current_server->prev = new_server;
231
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
233
perror_plus("clock_gettime");
240
163
* Initialize GPGME.
242
static bool init_gpgme(const char *seckey, const char *pubkey,
243
const char *tempdir){
165
static bool init_gpgme(const char *seckey,
166
const char *pubkey, const char *tempdir){
244
167
gpgme_error_t rc;
245
168
gpgme_engine_info_t engine_info;
256
179
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
262
185
rc = gpgme_data_new_from_fd(&pgp_data, fd);
263
186
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_data_new_from_fd: %s: %s\n",
187
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
188
gpgme_strsource(rc), gpgme_strerror(rc));
270
192
rc = gpgme_op_import(mc.ctx, pgp_data);
271
193
if(rc != GPG_ERR_NO_ERROR){
272
fprintf(stderr, "Mandos plugin mandos-client: "
273
"bad gpgme_op_import: %s: %s\n",
194
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
274
195
gpgme_strsource(rc), gpgme_strerror(rc));
278
199
ret = (int)TEMP_FAILURE_RETRY(close(fd));
280
perror_plus("close");
282
203
gpgme_data_release(pgp_data);
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"Initializing GPGME\n");
208
fprintf(stderr, "Initializing GPGME\n");
292
212
gpgme_check_version(NULL);
293
213
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
294
214
if(rc != GPG_ERR_NO_ERROR){
295
fprintf(stderr, "Mandos plugin mandos-client: "
296
"bad gpgme_engine_check_version: %s: %s\n",
215
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
297
216
gpgme_strsource(rc), gpgme_strerror(rc));
301
/* Set GPGME home directory for the OpenPGP engine only */
220
/* Set GPGME home directory for the OpenPGP engine only */
302
221
rc = gpgme_get_engine_info(&engine_info);
303
222
if(rc != GPG_ERR_NO_ERROR){
304
fprintf(stderr, "Mandos plugin mandos-client: "
305
"bad gpgme_get_engine_info: %s: %s\n",
223
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
224
gpgme_strsource(rc), gpgme_strerror(rc));
379
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
380
293
if(rc != GPG_ERR_NO_ERROR){
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"bad gpgme_op_decrypt: %s: %s\n",
294
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
295
gpgme_strsource(rc), gpgme_strerror(rc));
384
296
plaintext_length = -1;
386
298
gpgme_decrypt_result_t result;
387
299
result = gpgme_op_decrypt_result(mc.ctx);
388
300
if(result == NULL){
389
fprintf(stderr, "Mandos plugin mandos-client: "
390
"gpgme_op_decrypt_result failed\n");
301
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"Unsupported algorithm: %s\n",
303
fprintf(stderr, "Unsupported algorithm: %s\n",
394
304
result->unsupported_algorithm);
395
fprintf(stderr, "Mandos plugin mandos-client: "
396
"Wrong key usage: %u\n",
305
fprintf(stderr, "Wrong key usage: %u\n",
397
306
result->wrong_key_usage);
398
307
if(result->file_name != NULL){
399
fprintf(stderr, "Mandos plugin mandos-client: "
400
"File name: %s\n", result->file_name);
308
fprintf(stderr, "File name: %s\n", result->file_name);
402
310
gpgme_recipient_t recipient;
403
311
recipient = result->recipients;
404
312
while(recipient != NULL){
405
fprintf(stderr, "Mandos plugin mandos-client: "
406
"Public key algorithm: %s\n",
313
fprintf(stderr, "Public key algorithm: %s\n",
407
314
gpgme_pubkey_algo_name(recipient->pubkey_algo));
408
fprintf(stderr, "Mandos plugin mandos-client: "
409
"Key ID: %s\n", recipient->keyid);
410
fprintf(stderr, "Mandos plugin mandos-client: "
411
"Secret key available: %s\n",
315
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
316
fprintf(stderr, "Secret key available: %s\n",
412
317
recipient->status == GPG_ERR_NO_SECKEY
414
319
recipient = recipient->next;
534
438
GNUTLS_OPENPGP_FMT_BASE64);
535
439
if(ret != GNUTLS_E_SUCCESS){
537
"Mandos plugin mandos-client: "
538
441
"Error[%d] while reading the OpenPGP key pair ('%s',"
539
442
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
443
fprintf(stderr, "The GnuTLS error is: %s\n",
444
safer_gnutls_strerror(ret));
545
448
/* GnuTLS server initialization */
546
449
ret = gnutls_dh_params_init(&mc.dh_params);
547
450
if(ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS DH parameter initialization:"
451
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
550
452
" %s\n", safer_gnutls_strerror(ret));
553
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
554
456
if(ret != GNUTLS_E_SUCCESS){
555
fprintf(stderr, "Mandos plugin mandos-client: "
556
"Error in GnuTLS prime generation: %s\n",
457
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
557
458
safer_gnutls_strerror(ret));
573
474
static int init_gnutls_session(gnutls_session_t *session){
575
476
/* GnuTLS session creation */
577
ret = gnutls_init(session, GNUTLS_SERVER);
581
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_init(session, GNUTLS_SERVER);
582
478
if(ret != GNUTLS_E_SUCCESS){
583
fprintf(stderr, "Mandos plugin mandos-client: "
584
"Error in GnuTLS session initialization: %s\n",
479
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
585
480
safer_gnutls_strerror(ret));
591
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
593
gnutls_deinit(*session);
596
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
597
486
if(ret != GNUTLS_E_SUCCESS){
598
fprintf(stderr, "Mandos plugin mandos-client: "
599
"Syntax error at: %s\n", err);
600
fprintf(stderr, "Mandos plugin mandos-client: "
601
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
487
fprintf(stderr, "Syntax error at: %s\n", err);
488
fprintf(stderr, "GnuTLS error: %s\n",
489
safer_gnutls_strerror(ret));
602
490
gnutls_deinit(*session);
608
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
611
gnutls_deinit(*session);
614
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
615
497
if(ret != GNUTLS_E_SUCCESS){
616
fprintf(stderr, "Mandos plugin mandos-client: "
617
"Error setting GnuTLS credentials: %s\n",
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
618
499
safer_gnutls_strerror(ret));
619
500
gnutls_deinit(*session);
623
504
/* ignore client certificate if any. */
624
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
505
gnutls_certificate_server_set_request(*session,
626
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
1134
966
signal_received = sig;
1135
967
int old_errno = errno;
1136
/* set main loop to exit */
1137
968
if(mc.simple_poll != NULL){
1138
969
avahi_simple_poll_quit(mc.simple_poll);
1140
971
errno = old_errno;
1143
bool get_flags(const char *ifname, struct ifreq *ifr){
1146
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1148
perror_plus("socket");
1151
strcpy(ifr->ifr_name, ifname);
1152
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1155
perror_plus("ioctl SIOCGIFFLAGS");
1162
bool good_flags(const char *ifname, const struct ifreq *ifr){
1164
/* Reject the loopback device */
1165
if(ifr->ifr_flags & IFF_LOOPBACK){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Rejecting loopback interface \"%s\"\n", ifname);
1172
/* Accept point-to-point devices only if connect_to is specified */
1173
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Accepting point-to-point interface \"%s\"\n", ifname);
1180
/* Otherwise, reject non-broadcast-capable devices */
1181
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1188
/* Reject non-ARP interfaces (including dummy interfaces) */
1189
if(ifr->ifr_flags & IFF_NOARP){
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Rejecting non-ARP interface \"%s\"\n", ifname);
1197
/* Accept this device */
1199
fprintf(stderr, "Mandos plugin mandos-client: "
1200
"Interface \"%s\" is good\n", ifname);
1206
* This function determines if a directory entry in /sys/class/net
1207
* corresponds to an acceptable network device.
1208
* (This function is passed to scandir(3) as a filter function.)
1210
int good_interface(const struct dirent *if_entry){
1211
if(if_entry->d_name[0] == '.'){
1216
if(not get_flags(if_entry->d_name, &ifr)){
1218
fprintf(stderr, "Mandos plugin mandos-client: "
1219
"Failed to get flags for interface \"%s\"\n",
1225
if(not good_flags(if_entry->d_name, &ifr)){
1232
* This function determines if a directory entry in /sys/class/net
1233
* corresponds to an acceptable network device which is up.
1234
* (This function is passed to scandir(3) as a filter function.)
1236
int up_interface(const struct dirent *if_entry){
1237
if(if_entry->d_name[0] == '.'){
1242
if(not get_flags(if_entry->d_name, &ifr)){
1244
fprintf(stderr, "Mandos plugin mandos-client: "
1245
"Failed to get flags for interface \"%s\"\n",
1251
/* Reject down interfaces */
1252
if(not (ifr.ifr_flags & IFF_UP)){
1254
fprintf(stderr, "Mandos plugin mandos-client: "
1255
"Rejecting down interface \"%s\"\n",
1261
/* Reject non-running interfaces */
1262
if(not (ifr.ifr_flags & IFF_RUNNING)){
1264
fprintf(stderr, "Mandos plugin mandos-client: "
1265
"Rejecting non-running interface \"%s\"\n",
1271
if(not good_flags(if_entry->d_name, &ifr)){
1277
int notdotentries(const struct dirent *direntry){
1278
/* Skip "." and ".." */
1279
if(direntry->d_name[0] == '.'
1280
and (direntry->d_name[1] == '\0'
1281
or (direntry->d_name[1] == '.'
1282
and direntry->d_name[2] == '\0'))){
1288
/* Is this directory entry a runnable program? */
1289
int runnable_hook(const struct dirent *direntry){
1294
if((direntry->d_name)[0] == '\0'){
1299
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1300
"abcdefghijklmnopqrstuvwxyz"
1303
if((direntry->d_name)[sret] != '\0'){
1304
/* Contains non-allowed characters */
1306
fprintf(stderr, "Mandos plugin mandos-client: "
1307
"Ignoring hook \"%s\" with bad name\n",
1313
char *fullname = NULL;
1314
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1316
perror_plus("asprintf");
1320
ret = stat(fullname, &st);
1323
perror_plus("Could not stat hook");
1327
if(not (S_ISREG(st.st_mode))){
1328
/* Not a regular file */
1330
fprintf(stderr, "Mandos plugin mandos-client: "
1331
"Ignoring hook \"%s\" - not a file\n",
1336
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1337
/* Not executable */
1339
fprintf(stderr, "Mandos plugin mandos-client: "
1340
"Ignoring hook \"%s\" - not executable\n",
1348
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1350
struct timespec now;
1351
struct timespec waited_time;
1352
intmax_t block_time;
1355
if(mc.current_server == NULL){
1357
fprintf(stderr, "Mandos plugin mandos-client: "
1358
"Wait until first server is found. No timeout!\n");
1360
ret = avahi_simple_poll_iterate(s, -1);
1363
fprintf(stderr, "Mandos plugin mandos-client: "
1364
"Check current_server if we should run it,"
1367
/* the current time */
1368
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1370
perror_plus("clock_gettime");
1373
/* Calculating in ms how long time between now and server
1374
who we visted longest time ago. Now - last seen. */
1375
waited_time.tv_sec = (now.tv_sec
1376
- mc.current_server->last_seen.tv_sec);
1377
waited_time.tv_nsec = (now.tv_nsec
1378
- mc.current_server->last_seen.tv_nsec);
1379
/* total time is 10s/10,000ms.
1380
Converting to s from ms by dividing by 1,000,
1381
and ns to ms by dividing by 1,000,000. */
1382
block_time = ((retry_interval
1383
- ((intmax_t)waited_time.tv_sec * 1000))
1384
- ((intmax_t)waited_time.tv_nsec / 1000000));
1387
fprintf(stderr, "Mandos plugin mandos-client: "
1388
"Blocking for %" PRIdMAX " ms\n", block_time);
1391
if(block_time <= 0){
1392
ret = start_mandos_communication(mc.current_server->ip,
1393
mc.current_server->port,
1394
mc.current_server->if_index,
1395
mc.current_server->af);
1397
avahi_simple_poll_quit(mc.simple_poll);
1400
ret = clock_gettime(CLOCK_MONOTONIC,
1401
&mc.current_server->last_seen);
1403
perror_plus("clock_gettime");
1406
mc.current_server = mc.current_server->next;
1407
block_time = 0; /* Call avahi to find new Mandos
1408
servers, but don't block */
1411
ret = avahi_simple_poll_iterate(s, (int)block_time);
1414
if (ret > 0 or errno != EINTR){
1415
return (ret != 1) ? ret : 0;
1421
974
int main(int argc, char *argv[]){
1422
975
AvahiSServiceBrowser *sb = NULL;
1557
1071
delay = strtof(arg, &tmp);
1558
1072
if(errno != 0 or tmp == arg or *tmp != '\0'){
1559
argp_error(state, "Bad delay");
1561
case 132: /* --retry */
1563
retry_interval = strtod(arg, &tmp);
1564
if(errno != 0 or tmp == arg or *tmp != '\0'
1565
or (retry_interval * 1000) > INT_MAX
1566
or retry_interval < 0){
1567
argp_error(state, "Bad retry interval");
1570
case 133: /* --network-hook-dir */
1574
* These reproduce what we would get without ARGP_NO_HELP
1576
case '?': /* --help */
1577
argp_state_help(state, state->out_stream,
1578
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1579
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1580
case -3: /* --usage */
1581
argp_state_help(state, state->out_stream,
1582
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1583
case 'V': /* --version */
1584
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1585
fprintf(state->out_stream, "%s\n", argp_program_version);
1586
exit(argp_err_exit_status);
1073
fprintf(stderr, "Bad delay\n");
1589
1082
return ARGP_ERR_UNKNOWN;
1594
1087
struct argp argp = { .options = options, .parser = parse_opt,
1595
1088
.args_doc = "",
1596
1089
.doc = "Mandos client -- Get and decrypt"
1597
1090
" passwords from a Mandos server" };
1598
ret = argp_parse(&argp, argc, argv,
1599
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1606
perror_plus("argp_parse");
1607
exitcode = EX_OSERR;
1610
exitcode = EX_USAGE;
1616
/* Work around Debian bug #633582:
1617
<http://bugs.debian.org/633582> */
1620
/* Re-raise priviliges */
1624
perror_plus("seteuid");
1627
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1628
int seckey_fd = open(seckey, O_RDONLY);
1629
if(seckey_fd == -1){
1630
perror_plus("open");
1632
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1634
perror_plus("fstat");
1636
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1637
ret = fchown(seckey_fd, uid, gid);
1639
perror_plus("fchown");
1643
TEMP_FAILURE_RETRY(close(seckey_fd));
1647
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1648
int pubkey_fd = open(pubkey, O_RDONLY);
1649
if(pubkey_fd == -1){
1650
perror_plus("open");
1652
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1654
perror_plus("fstat");
1656
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1657
ret = fchown(pubkey_fd, uid, gid);
1659
perror_plus("fchown");
1663
TEMP_FAILURE_RETRY(close(pubkey_fd));
1667
/* Lower privileges */
1671
perror_plus("seteuid");
1675
/* Find network hooks and run them */
1677
struct dirent **direntries;
1678
struct dirent *direntry;
1679
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1682
perror_plus("scandir");
1684
int devnull = open("/dev/null", O_RDONLY);
1685
for(int i = 0; i < numhooks; i++){
1686
direntry = direntries[0];
1687
char *fullname = NULL;
1688
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1690
perror_plus("asprintf");
1693
pid_t hook_pid = fork();
1696
dup2(devnull, STDIN_FILENO);
1698
dup2(STDERR_FILENO, STDOUT_FILENO);
1699
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1701
perror_plus("setenv");
1704
ret = setenv("DEVICE", interface, 1);
1706
perror_plus("setenv");
1709
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1711
perror_plus("setenv");
1714
ret = setenv("MODE", "start", 1);
1716
perror_plus("setenv");
1720
ret = asprintf(&delaystring, "%f", delay);
1722
perror_plus("asprintf");
1725
ret = setenv("DELAY", delaystring, 1);
1728
perror_plus("setenv");
1732
ret = execl(fullname, direntry->d_name, "start", NULL);
1733
perror_plus("execl");
1736
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1737
perror_plus("waitpid");
1741
if(WIFEXITED(status)){
1742
if(WEXITSTATUS(status) != 0){
1743
fprintf(stderr, "Mandos plugin mandos-client: "
1744
"Warning: network hook \"%s\" exited"
1745
" with status %d\n", direntry->d_name,
1746
WEXITSTATUS(status));
1750
} else if(WIFSIGNALED(status)){
1751
fprintf(stderr, "Mandos plugin mandos-client: "
1752
"Warning: network hook \"%s\" died by"
1753
" signal %d\n", direntry->d_name,
1758
fprintf(stderr, "Mandos plugin mandos-client: "
1759
"Warning: network hook \"%s\" crashed\n",
1091
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1092
if(ret == ARGP_ERR_UNKNOWN){
1093
fprintf(stderr, "Unknown error while parsing arguments\n");
1094
exitcode = EXIT_FAILURE;
1775
1100
avahi_set_log_function(empty_log);
1778
if(interface[0] == '\0'){
1779
struct dirent **direntries;
1780
/* First look for interfaces that are up */
1781
ret = scandir(sys_class_net, &direntries, up_interface,
1784
/* No up interfaces, look for any good interfaces */
1786
ret = scandir(sys_class_net, &direntries, good_interface,
1790
/* Pick the first interface returned */
1791
interface = strdup(direntries[0]->d_name);
1793
fprintf(stderr, "Mandos plugin mandos-client: "
1794
"Using interface \"%s\"\n", interface);
1796
if(interface == NULL){
1797
perror_plus("malloc");
1799
exitcode = EXIT_FAILURE;
1805
fprintf(stderr, "Mandos plugin mandos-client: "
1806
"Could not find a network interface\n");
1807
exitcode = EXIT_FAILURE;
1812
1103
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1813
1104
from the signal handler */
1814
1105
/* Initialize the pseudo-RNG for Avahi */
1815
1106
srand((unsigned int) time(NULL));
1816
1107
mc.simple_poll = avahi_simple_poll_new();
1817
1108
if(mc.simple_poll == NULL){
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Avahi: Failed to create simple poll object.\n");
1820
exitcode = EX_UNAVAILABLE;
1109
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1110
exitcode = EXIT_FAILURE;
1824
1114
sigemptyset(&sigterm_action.sa_mask);
1825
1115
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1827
perror_plus("sigaddset");
1828
exitcode = EX_OSERR;
1117
perror("sigaddset");
1118
exitcode = EXIT_FAILURE;
1831
1121
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1833
perror_plus("sigaddset");
1834
exitcode = EX_OSERR;
1123
perror("sigaddset");
1124
exitcode = EXIT_FAILURE;
1837
1127
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1839
perror_plus("sigaddset");
1840
exitcode = EX_OSERR;
1129
perror("sigaddset");
1130
exitcode = EXIT_FAILURE;
1843
1133
/* Need to check if the handler is SIG_IGN before handling:
1847
1137
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1849
perror_plus("sigaction");
1139
perror("sigaction");
1140
return EXIT_FAILURE;
1852
1142
if(old_sigterm_action.sa_handler != SIG_IGN){
1853
1143
ret = sigaction(SIGINT, &sigterm_action, NULL);
1855
perror_plus("sigaction");
1856
exitcode = EX_OSERR;
1145
perror("sigaction");
1146
exitcode = EXIT_FAILURE;
1860
1150
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1862
perror_plus("sigaction");
1152
perror("sigaction");
1153
return EXIT_FAILURE;
1865
1155
if(old_sigterm_action.sa_handler != SIG_IGN){
1866
1156
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1868
perror_plus("sigaction");
1869
exitcode = EX_OSERR;
1158
perror("sigaction");
1159
exitcode = EXIT_FAILURE;
1873
1163
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1875
perror_plus("sigaction");
1165
perror("sigaction");
1166
return EXIT_FAILURE;
1878
1168
if(old_sigterm_action.sa_handler != SIG_IGN){
1879
1169
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1881
perror_plus("sigaction");
1882
exitcode = EX_OSERR;
1171
perror("sigaction");
1172
exitcode = EXIT_FAILURE;
1887
1177
/* If the interface is down, bring it up */
1888
if(strcmp(interface, "none") != 0){
1178
if(interface[0] != '\0'){
1889
1179
if_index = (AvahiIfIndex) if_nametoindex(interface);
1890
1180
if(if_index == 0){
1891
fprintf(stderr, "Mandos plugin mandos-client: "
1892
"No such interface: \"%s\"\n", interface);
1893
exitcode = EX_UNAVAILABLE;
1181
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1182
exitcode = EXIT_FAILURE;
2254
1491
ret = seteuid(0);
2256
perror_plus("seteuid");
2258
1495
if(geteuid() == 0){
2259
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2261
perror_plus("ioctl SIOCGIFFLAGS");
2262
} else if(network.ifr_flags & IFF_UP){
2263
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1498
perror("ioctl SIOCGIFFLAGS");
1499
} else if(network.ifr_flags & IFF_UP) {
1500
network.ifr_flags &= ~IFF_UP; /* clear flag */
2264
1501
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2266
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1503
perror("ioctl SIOCSIFFLAGS");
2269
1506
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2271
perror_plus("close");
2273
/* Lower privileges permanently */
1510
/* Lower privileges, permanently this time */
2275
1512
ret = setuid(uid);
2277
perror_plus("setuid");
2282
/* Removes the GPGME temp directory and all files inside */
1519
/* Removes the temp directory used by GPGME */
2283
1520
if(tempdir_created){
2284
struct dirent **direntries = NULL;
2285
struct dirent *direntry = NULL;
2286
int numentries = scandir(tempdir, &direntries, notdotentries,
2288
if (numentries > 0){
2289
for(int i = 0; i < numentries; i++){
2290
direntry = direntries[i];
1522
struct dirent *direntry;
1523
d = opendir(tempdir);
1525
if(errno != ENOENT){
1530
direntry = readdir(d);
1531
if(direntry == NULL){
1534
/* Skip "." and ".." */
1535
if(direntry->d_name[0] == '.'
1536
and (direntry->d_name[1] == '\0'
1537
or (direntry->d_name[1] == '.'
1538
and direntry->d_name[2] == '\0'))){
2291
1541
char *fullname = NULL;
2292
1542
ret = asprintf(&fullname, "%s/%s", tempdir,
2293
1543
direntry->d_name);
2295
perror_plus("asprintf");
2298
1548
ret = remove(fullname);
2300
fprintf(stderr, "Mandos plugin mandos-client: "
2301
"remove(\"%s\"): %s\n", fullname, strerror(errno));
1550
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2303
1553
free(fullname);
2307
/* need to clean even if 0 because man page doesn't specify */
2309
if (numentries == -1){
2310
perror_plus("scandir");
2312
1557
ret = rmdir(tempdir);
2313
1558
if(ret == -1 and errno != ENOENT){
2314
perror_plus("rmdir");
2319
1564
sigemptyset(&old_sigterm_action.sa_mask);
2320
1565
old_sigterm_action.sa_handler = SIG_DFL;
2321
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2322
&old_sigterm_action,
1566
ret = sigaction(signal_received, &old_sigterm_action, NULL);
2325
perror_plus("sigaction");
2328
ret = raise(signal_received);
2329
} while(ret != 0 and errno == EINTR);
2331
perror_plus("raise");
2334
TEMP_FAILURE_RETRY(pause());
1568
perror("sigaction");
1570
raise(signal_received);
2337
1573
return exitcode;